This is the " inbreeding depression " from this Genetic Drift . However, as noted previously, three progenies were " not " depressed ( k = 1, 2, 5 ), and had means even greater than that of the panmictic equivalent.
22.
In attempting to describe the mathematical properties of structured populations, Sewall Wright proposed a " factor of Panmixia " ( P ) to include in the equations describing the gene frequencies in a population, and accounting for a population's tendency towards panmixia, while a " factor of Fixation " ( F ) would account for a population's departure from the Hardy-Weinberg expectation, due to less than panmictic mating.
23.
This failure of panmixia leads to two important changes in overall population structure : ( 1 ) the component gamodemes vary ( through gamete sampling ) in their allele frequencies when compared with each other and with the theoretical panmictic original ( this is known as " dispersion ", and its details can be estimated using expansion of an appropriate binomial equation ); and ( 2 ) the level of homozygosity rises in the entire collection of gamodemes.
